Compositions: coating or plastic – Coating or plastic compositions – Metal-depositing composition or substrate-sensitizing...
Patent
1987-04-24
1988-07-12
Yarbrough, Amelia Burgess
Compositions: coating or plastic
Coating or plastic compositions
Metal-depositing composition or substrate-sensitizing...
106 20, 2524081, C09D 1100
Patent
active
047567589
ABSTRACT:
The thermochromic jet ink compositions of the present invention undergo color changes in response to changes in thermal environment. Additionally, the inks comprise a combination of solvent, dyes and other essential ingredients which make them suitable for ink jet printing, or printing which is effected without contact between the printing device and the substrate on which the printed characters are deposited. The present invention provides thermochromic ink compositions with enhanced thermal specificity. Moreover, these inks are capable of indicating that the substrate has been exposed to such a specific thermal environment for at least a specified minimal period of time. The color change so effected is irreversible and does not require steam or moisture to leach out selected components of the composition thereby providing a more rapid and distinct color change. The most notable use of the present invention is to indicate completion of pasteurization or sterilization of the substrate or its contents.
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Elue Paul N.
Lent Bruce A.
Burgess Yarbrough Amelia
Skane Christine
Videojet Systems International Inc.
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